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sammy [17]
3 years ago
14

13) What are the benefits and detriments of each of the following? Consider both the systems and the programmers’ levels. a. Sym

metric and asymmetric communication b. Automatic and explicit buffering c. Send by copy and send by reference d. Fixed-sized and variable-sized messages
Computers and Technology
1 answer:
dsp733 years ago
5 0

Answer:

Automatic and Explicit Buffering.

In the case of explicit buffering, the length of the queue is provided while in automatic buffering the queue size needs to be indefinite. In automatic buffering there is no need to block the sender while coping the message. While in explicit buffering the sender is blocked for the space in queue.

No memory is being wasted in explicit buffering.

Send by Copy and Send by Reference.

By using the send by copy method, the receiver is not able to change the state of parameter while send by reference allow. The advantage of using the send by reference method is that it allows to change a centralized application to its distributed version.

Fixed-sized and Variable-sized Messages.

In fixed size messaging refers, the buffer size is fixed. This means only a particular number of messages can only be supported by the fixed size buffer. The drawback of the fixed size messages is that they must be a part of fixed size buffer. These are not a part of variable size buffer. The advantage of variable size message is that the length of the message is variable means not fixed. The buffer length is unknown. The shared memory is being used by the variable size messages.

Explanation:

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Alexxx [7]

Answer:

// program in Python to check perfect number

#function to find number is perfect or not

def is_Perfect_Number(n):

   #total variable

   tot = 1

   i = 2

   #sum of all divisor of number

   while i*i<=n:

       if n%i==0:

           tot = tot + i + n/i

       if tot == n and n != 1:

           return 1

       i = i+1  

   return 0

#read until user enter a perfect number

while True:

   #read integer

   num = int(input("Input an integer: "))

   #call the function

   if(is_Perfect_Number(num)):

       print(num,"is perfect number")

       #if perfect number break

       break

   else:

       print(num,"is not a perfect number")

       #ask again

   print("try again.")

Explanation:

Read number from user and then call the function is_Perfect_Number() with  parameter "num".This will find the sum of all divisor of number.If sum is  equal to number then it will return 1 else return 0.If the number is not  perfect then it will again ask to enter a number until user enter a perfect  number.

Output:

Input an integer: 24

24 is not a perfect number                                                                                                

try again.                                                                                                                

Input an integer: 28                                                                                                      

28 is perfect number

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3 years ago
Question # 2
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People who enjoy working with their hands might enjoy a career as an
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People that enjoy working with their hands might enjoy being a construction worker but their are a lot of other jobs that involve using their hands but being a construction worker takes a lot of effort and a lot of hard work to complete.
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4 years ago
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Using Word, Maureen is writing an outline of a presentation she plans to give to her company. She will be showing a video during
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Which securities protect data through processes, procedures,decisions,and user pernissions. Determines where and how data can be
vovangra [49]

Answer:

Data can be stored on storage devices.

Explanation:

Network security, Application security and information security are the securities that protect data. Data can be stored on storage devices such as hard disk drives, solid state drives, external hard drives, USB flash drives and SD cards etc. Hard disk drives, floppy disks and tapes store data magnetically. The data can be stored with a device that spins the disk with magnetic coatings and heads has the ability to read and write information in the form of magnetic patterns.

5 0
3 years ago
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